02 chevy venture heater problems

2002 CHEVROLET VENTURE
122,000 MILES • 6 CYL • FWD • AUTOMATIC
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TPORTER
  • MEMBER
  • 1 POST
have a 2002 chevy venture heater only blows warm air when going down the road. as soon as you stop it very soon starts blowing cold air. put in new dash controls but did not solve the problem.
Feb 22, 2011 at 6:47 AM
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MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
Could be a thermostat, but check the heater core. When engine is hot, quickly touch the upper and lower heater core hoses, if one is hot and one cool/warm, then heater core is blocked.

If both are warm then thermostat.
Feb 22, 2011 at 6:55 AM
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